FOR SCHEMA WITH CAPITAL LETTERS


PROBLEM
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1. When using lower_case_table_names = 2 (only used in
   case insensitive file system) innodb stores database 
   name in lower case in SYS_TABLES, where as in the disk
   the database name is stored in the format specified in 
   create statement.In this case we use capital letters in 
   create statement.
2. During crash recovery fil_load_single_table_tablespace()
   function is called which populates fil_space_t structure
   with capital database name found in the disk and stores 
   it in two hash tables,one based on name and another based
   on tablespace id. 
3. When opening the tablespace with fil_open_single_table_tablespace()
   we first check whether the fil_space_t structure 
   is present in hash based on database name obtained from
   the SYS_TABLES. Since the database name is in small letters
   it cannot find the fil_space_t object in the hash ,then
   it tries to get the fil_space_t object using tablespace id 
   and is successful in getting it. 
4. This is seen as a conflict and the table's ibd file is set 
   as missing and we cannot access the table.

FIX
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1. While doing crash recovery for case insensitive systems
   we convert the database names to lower case .

Approved bt Kevin [#rb 6737 ]